Device to deliver a powdery medicine into nasal cavity

Abstract

A device that delivers a powdery medicine for a nasal cavity includes positioning guides that cause a capsule to slide as far as a predetermined position and are provided on the side of cutters to make holes on both ends of the capsule provided between the connection port on the side of a nozzle that sprays the powdery medicine into the nasal cavity. The device further includes a connection port on the side of a pump that supplies spray air to the nozzle in order to make the size of the holes made on both ends of the capsule constant, wherein a distance between the connection ports is made shorter than a distance between blade tips of the cutters.

Description

[0001]This application is a national stage application filed under 35 U.S.C. 371 based on International Application No. PCT / JP03 / 01958 filed Oct. 9, 2003.TECHNICAL FIELD[0002]The present invention concerns a device to deliver a powdery medicine into nasal cavity that delivers a powdery medicine filled in a capsule into a nasal cavity.BACKGROUND ART[0003]An existent device to deliver a powdery medicine into a nasal cavity of a patient suffering from asthma or nasal allergy (refer, for example, to JP-A No. 46-4094) is adapted for detaching a cap-type nozzle fitted detachably to the top end of a cylindrical member formed with an air discharge port of a pump that discharges air by squeezing a rubber ball with a hand, attaching a capsule filled with a powdery medicine to the inside of the cylindrical member, fitting the nozzle again to the top end of the cylindrical member, then pressing the pump formed as the rubber ball so as to squeeze in the direction of the nozzle, protruding the po...

AI Technical Summary

Benefits of technology

The present invention relates to a device for delivering and dosing a powdery medicine into a nasal cavity for spraying. The technical effects of the invention include preventing variation in the diameter of holes made on both ends of a capsule, and preventing spray air from leaking through the capsule in case the diameter of the holes is substantially identical to the open diameter of the connection ports on the nozzle and pump. The invention also includes a capsule holder for holding the capsule, a cutter for partially cutting off both ends of the capsule, and a positioning guide for guiding both ends of the capsule to a predetermined position. These features ensure high accuracy in opening the holes on the capsule and efficient spraying of the powdery medicine.

Problems solved by technology

However, in the device described above, the operation is extremely troublesome since this requires to detach or attach the cap-type nozzle from or to the top end of the cylindrical member upon loading the capsule in the cylindrical body or take-out a used capsule from the inside of the cylindrical member, or press the pump so as to squeeze in the direction of the nozzle to protrude the needle contained in the pump after loading the capsule in the cylindrical member in order to make the holes on both ends of the capsule.

Further, upon making the holes on both ends of the capsule, holes are not sometimes made at the ends of the capsule on the side of the nozzle depending on the case since the pump is not pressed to a position where the pointed top of the needle contained in the pump penetrates the capsule and, when the pump is actuated in this state, it may possibly cause a worry not only that the powdery medicine in the capsule is not sprayed from the nozzle, but also a portion of the powdery medicine may possibly be sucked into the pump.

Further, upon sticking the needle for making holes from one to the other side of the capsule loaded in the cylindrical member so as to be sandwiched between the air discharge port of the pump and the nozzle to make holes, since the end of the capsule is concaved inward by the pressing force of the needle to form a gap between the hole made at the end and the air discharge port of the pump or between the hole and the nozzle, the powdery medicine in the capsule can not be sprayed efficiently from the nozzle but a portion of the powdery medicine scatters into the cylindrical member to possibly cause a worry that the powdery medicine can not be sprayed by a necessary amount into the nasal cavity.

Further, when the needle is stuck to make holes on both ends of the capsule, since residues of the capsule broken through by the needle protrude at the periphery of the hole to hinder the flow of air for supplying the powdery medicine in the capsule to the nozzle, it may possibly cause a disadvantage that the entire amount of the powdery medicine in the capsule can not be discharged but remains in the capsule.

However, in a test for practical use of the device described above, it has been found that the diameter of the holes opened on both ends of the capsule varies and, in a case where the hole diameter is smaller than the open diameter of the connection port on the side of the nozzle or the connection port on the side of the pump, it is difficult to thoroughly discharge the powdery medicine in the capsule by the operation of the pump only for once.

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